Definitions
from The Century Dictionary.
- noun A coal-tar color used in dyeing, prepared by heating together phthalic anhydrid and pyrogallic acid, adding carbonate of soda, and precipitating with an acid. It produces tolerably fast shades of purple and violet on cotton, wool, and silk.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Chem.) A red crystalline dyestuff, obtained by heating together pyrogallic and phthalic acids.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun organic chemistry A red
crystalline dyestuff obtained by heatingpyrogallic acid andphthalic acid together.
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
From pyrogallol and phthalein.
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Examples
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